Bosch 24 in. SHX99A15UC Stainless Steel Dishwasher "dishwaser rinse aid work" Questions

...dishwaser is not drying. I did not use the rinse agent as I had just received the dishwasher and just wanted to "test" it out, so I ran a cycle without it. Could this be the problem? Also I read on ...

...rinse aid wash flashing,so i filled them both up but it still wont wash,the lights keep flashing salt and 40 50 programmes,it drains then stops I had a hotpoint engineer try to fix this type of ...